International (ICES) and national (UK) fish stock and shellfish stock data from 2020 assessment year

The dataset collected includes assessment output relating to the years from
1905 to 2020 inclusive for the following variables for each stock: the annual
recruitment estimate, the stock size (spawning stock biomass), landings
(tonnes of fish brought to shore), catches (tonnes of fish caught at sea),
fishing pressure (a fishing mortality rate), Fmsy (the target fishing
mortality that will achieve maximum sustainable yield in the long term), Upper
and lower range estimates for Fmsy consistent with multi-annual plans and
ICES advice, MSYB trigger (a threshold for spawning stock biomass, below which
fishing mortality should be reduced below Fmsy, following the ICES advice
rule, to avoid reduced reproductive capacity, Blim (a lower limit threshold
for spawning stock biomass below which there is a high risk of reduced
reproductive capacity). The stock assessment data for fish and shellfish
stocks of UK interest is used to assess indicators of reproductive capacity
(based on spawning stock biomass) and fishing pressure (based on fishing
mortality).

本数据集的收集涵盖了自1905年至2020年（含）期间的评估输出，涉及以下各股票的多个变量：年度招募估计值、种群规模（产卵种群生物量）、渔获量（上岸鱼类的吨数）、捕捞量（海洋捕捞的鱼类吨数）、捕捞压力（捕捞死亡率）、Fmsy（长期实现最大可持续产量的目标捕捞死亡率）、Fmsy的上限和下限估计值，该估计值与多年度计划和ICES建议相符，MSYB触发阈值（产卵种群生物量的阈值，当其低于此阈值时，应依据ICES建议规则降低捕捞死亡率，以避免生殖能力下降，Blim（产卵种群生物量的下限阈值，当其低于此阈值时，存在生殖能力下降的高风险）。本数据集关于英国感兴趣的鱼类和贝类种群的评价数据，用于评估生殖能力指标（基于产卵种群生物量）和捕捞压力指标（基于捕捞死亡率）。